JP2001137917A - Driving and transmitting device for strip temper rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a generation of chatter marks and coil break by separating the shaft end part of an upper work roll from a roll coupling in the temper rolling of a metallic strip. SOLUTION: In the temper rolling mill which is provided with the upper work roll 12 the cross-sectional shape of the end part 12a of the roll shaft of which is formed into an elliptic shape and a roll coupling 15 for transmitting driving torque to a spindle 17 by fitting to and connecting with the shaft end part 12a of the roll of the work roll, a fitting/detaching device 25 for executing fitting and detaching of the roll coupling 15 and the shaft end part 12a of the roll and a receiving stand 20 for supporting the spindle 17 when the roll coupling 15 is separated from the shaft end part 12a of the upper work roll are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing chatter marks and buckling of rolled material in temper rolling of a metal strip.

[0002]

2. Description of the Related Art FIG. 1 is a side view showing an example of a work roll drive system of a temper rolling mill 1. In the drawing, reference numeral 2 denotes a work roll, 3 denotes a backup roll, 4 denotes a motor, 5 denotes a reduction gear, 6 is a spindle and 7 is a hydraulic pressure reduction cylinder.
The roll shaft end 2a of the work roll 2 is formed in an oval cross section as shown in the cross-sectional view of FIG. 2, and the roll coupling 8 is fitted and connected to the roll shaft end 2a to connect the spindle 6 and the work. Roll 2 is connected. Although not shown, a support for supporting each roll coupling 8 at the time of roll replacement is provided below the roll coupling 8.

[0003] In this type of roll coupling 8, a play gap is provided between the roll shaft end 2a and the roll coupling 8 in order to facilitate the fitting and disengagement at the time of roll exchange. Therefore, when the roll shaft end 2a rotates due to the rotation of the roll coupling 8, when the roll shaft end 2a rotates from FIG.
When moving to (c) and from FIG. 2 (d) to FIG. 2 (e), the arc surface 8a of the roll coupling falls on the arc surface 2b at the end of the roll shaft (from the broken line to the solid line).

When the roll coupling 8 falls to the roll shaft end 2a, the work roll 2 vibrates (moves up and down).
give. Due to the vibration of the work roll 2, a surface defect called a chatter mark or a waist break occurs on the strip twice in one rotation of the work roll, which causes a quality defect. In particular, the strip surface side due to the upper work roll 2 becomes a problem. I was

Conventionally, in order to prevent the occurrence of chatter marks and breaks in the roll, the structure of the roll coupling has to be improved by, for example, inserting a spacer or supplying hydraulic pressure to the play between the roll coupling and the end of the roll shaft. Although a method for improvement is known, for example, from JP-A-6-39207 and JP-A-3-9208, chatter marks and hip breaks cannot be sufficiently prevented.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to reliably prevent chatter marks and buckling of a rolled material due to vibration of a work roll, which have been the most problematic in the temper rolling of a strip. .

[0007]

According to the present invention, there is provided a drive transmission device for a strip temper rolling mill, comprising: an upper work roll having a roll shaft end formed in an oval cross section; In a temper rolling mill provided with a roll coupling that is fitted and connected to a shaft end and transmits a driving torque to a spindle, a fitting and removing device that fits and removes the roll coupling and a roll shaft end, And a support base for supporting the spindle when the roll coupling is separated from the shaft end of the upper work roll.

[0008] The above-mentioned disengaging device comprises a shift lever pivotally supported at a central portion thereof, having an upper end connected to an actuator, and a lower end rotatably connected to a neck portion of the roll coupling. The portion is fitted and connected to a joint of the spindle via a spline.

[0009]

3 to 11 show drawings for explaining an embodiment of the present invention. The temper rolling mill 11 shown in FIGS. 3 and 4 (these are continuous right and left) is shown in FIG. In this example, upper and lower rolls are provided.
The upper and lower backup rolls arranged above and below, the pressing device for pushing up the lower backup roll, and the electric motor driving the upper and lower work rolls 12 and 13 are not shown in order to simplify the drawing.

Upper work roll 12 and lower work roll 1
3, the roll shaft ends 12a and 13a are formed in an oval cross section as shown in FIG.
5 and 16 are provided with oval holes into which the roll shaft ends 12a and 13a fit.

In FIG. 4, the roll shaft end 13a is connected to the spindle 18 by fitting a roll coupling 16, and the roll shaft end 12a is disconnected from the spindle 17 by removing the roll coupling 15. Have been. The spindle 17 disconnected from the roll shaft end 12a is connected to a pair of receiving rollers 2 provided on a receiving base 20 shown in FIG.
1, 21 are supported. Reference numeral 38 denotes a support for supporting the spindle 18 of the lower work roll when the hydraulic actuator 35 shown in FIG. 9 fails.

As shown in FIGS. 5 and 6 (these are continuous right and left) and FIGS. 3 and 4, the neck portion 15a of the roll coupling 15 and the mill stand frame 23 are provided.
Between the bracket 24 attached to (FIG. 6),
An engagement / disengagement device 25 for engaging and disengaging the roll coupling 15 and the roll shaft end 12a is provided. The fitting / disengaging device 25 is configured such that a pneumatic actuator 26 fixed to the bracket 24 and a neck 15 a of the roll coupling 15 are connected via a shift lever 27. The shift lever 27 has a center portion pivotally supported by the bracket 24 by a support pin 28, and a lower end portion connected to the adapter 39 through the elongated hole 22.

As shown in FIG. 8, the neck portion 15a of the roll coupling is connected to the shift lever 27 via a bearing 34 and an adapter 39, and is rotatable. The neck 15a is fitted and connected to the spindle joint 17a via a spline 29, and is slidable along the joint 17a.

Accordingly, the operation of the pneumatic actuator 26 causes the shift lever 27 to move between the solid line and the chain line with the support pin 28 as a fulcrum, so that the roll coupling 15 is fitted or disengaged from the roll shaft end 12a. Or The roll couplings 15 and 16 are provided with a speed reducer 19.
The roll is rotated by an oval matching mechanism (not shown) provided in the printer, and the direction of the oval hole is adjusted to a predetermined direction when the roll is replaced.

As shown in FIG. 6, a support receiving member 31 attached to a mill stand frame 23 has upper and lower spindles 17 when the upper and lower work rolls 12 and 13 are replaced.
A spindle support 30 for supporting the motor 18 is provided. This spindle support 30 is located on the left and right of the spindles 17 and 18 as shown in FIGS. 9 to 11, and has a pair of support frames 32 and 32 whose upper portions are supported by support pins 33 and 33 on support receiving members 31 and 31. When,
Support frames 32, 32 and support receiving members 31,
And hydraulic actuators 35, 3 connected between
5.

Inside the support frames 32, 32, a total of three pairs of horizontal receiving rollers 36 for supporting the spindles 17, 18 and a pair of vertical receiving rollers 37 for supporting the roll coupling 15 are mounted. When the 35 is extended, the support frames 32, 32 move in the closing direction to hug and support the spindles 17, 18, and when the hydraulic actuator 35 is contracted, the support frames 32, 32 move in the opening direction to release the support of the spindles 17, 18.

The vertical receiving roller 37 is provided at an angle, so that the roll shaft end 12 of the roll coupling 15 is provided.
The sliding movement at the time of fitting into and removing from the roll couplings a is facilitated, and the lateral support rollers 36 fix the orientations of the oval holes of the roll couplings 15 and 16 to facilitate the fitting into the roll shaft ends 12a and 13a.

Next, the operation state will be described. When performing temper rolling other than roll smoothing operation for dull finishing,
The lower work roll 13 of the upper and lower work rolls 12 and 13 shown in FIG. 4 is driven, and the upper work roll 12 is not driven. The pneumatic actuator 26 is extended to move the shift lever 27 and the roll coupling 15 to the position indicated by the solid line, and the roll coupling 1 is moved from the roll shaft end 12a.
Cut off 5.

When the pair of hydraulic actuators 35 shown in FIGS. 9 to 11 are contracted to pivot the support frames 32, 32 outward around the support pins 33, 33 and open, the spindle 17 Receiving roller 21,
21 is supported by dropping.

In this state, an electric motor (not shown) is driven to rotate only the lower work roll 13 shown in FIG. Although the upper work roll 12 rotates with the passing of the strip, the roll shaft end 12a having an oval cross section is separated from the roll coupling 15, so that the roll shaft end 12a and the roll coupling 15 do not rotate. . For this reason, as shown in FIG. 2, the chatter mark or strip break of the strip due to the work roll 2 vibrating (moving up and down) due to the arc surface 8a of the roll coupling falling on the arc surface 2b of the roll shaft does not occur.

When performing the dulling roll preparatory operation as preliminary preparation for the dull finishing pass rolling, the upper and lower work rolls 12 and 13 are replaced with the dull finishing rolls and rotated. For this purpose, a pair of hydraulic actuators 35, 3 and 3 shown in FIGS.
5, the support frames 32, 32 are pivoted inward about the support pins 33, 33 to close them, whereby the three pairs of horizontal receiving rollers 36 and the pair of vertical receiving rollers 3 are rotated.
7 is a spindle 17, 18 and a roll coupling 1
Holds 5 and 16.

The pneumatic actuator 26 is contracted to move the shift lever 27 and the roll coupling 15 to the position indicated by the dashed line, and the roll coupling 1 is moved by a small fitting mechanism (not shown) provided in the speed reducer 19.
5 and 16 are rotated so that the direction of the oval hole is a predetermined direction.

The upper work roll 12 and the lower work roll 13 are taken out from the operation side (WS) using a known roll changer, new dull finishing rolls are inserted, and the shaft end of each roll is fitted into each roll coupling. I do. The pair of hydraulic actuators 35, 35 are contracted to pivot the support frames 32, 32 outward and open, and the spindle 1
Release the support of 7 and 18. In this state, an electric motor (not shown) is driven to rotate the upper and lower work rolls 12 and 13 to perform a predetermined dull roll stitching operation.

When the roll-in operation of the dull roll is completed,
Extend the pneumatic actuator 26 to shift lever 2
7 and the roll coupling 15 are moved to the positions indicated by the solid lines, and the roll coupling 15 is separated from the roll shaft end 12a. In this state, the electric motor (not shown) is driven to drive only the lower work roll to perform the temper rolling of dull finish.

[0025]

According to the present invention, in a temper rolling mill in which the fitting surface between the shaft end of the upper work roll and the roll coupling is formed in an oval cross section, the shaft end of the upper work roll and the roll cup are formed. By performing the rolling while separating from the ring, it is possible to reliably prevent the rolled material from being bent and chatter marks generated due to the rotation of the upper work roll.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a conventional temper rolling mill.

FIG. 2 is a diagram for explaining vibration of an upper work roll during temper rolling;

FIG. 3 is a side view (inside view) illustrating an embodiment of the present invention (continued from FIG. 4).

FIG. 4 is a side view (inside view) for explaining the embodiment of the present invention (continuation of FIG. 3);

FIG. 5 is a side view (outside view) for explaining an embodiment of the present invention (continued from FIG. 6);

FIG. 6 is a side view (outside view) for explaining the embodiment of the present invention (continuation of FIG. 5);

FIG. 7 is a front view showing a spindle support base (A-
A diagram)

FIG. 8 is a plan view (partial sectional view) taken along line BB of FIG. 4;

9 is a front view showing a spindle support (C- in FIG. 6);
C diagram (partial sectional view)

FIG. 10 is a plan view taken along line DD of FIG. 9;

FIG. 11 is a plan view taken along line EE of FIG. 9;

[Explanation of symbols]

 (Conventional) 1 Temper rolling mill 2 Work roll 2a Work roll shaft end 3 Backup roll 4 Motor 5 Reduction gear 6 Spindle 7 Hydraulic pressure reduction cylinder 8 Roll coupling (the present invention) 11 Temper rolling mill 12 Upper work roll 12a Roll shaft end of work roll 13 Lower work roll 13a Roll shaft end of lower work roll 14 Intermediate roll 15 Roll coupling of upper work roll 15a Neck of roll coupling 16 Roll coupling of lower work roll 17 Upper work roll Spindle 17a Spindle joint 18 Lower work roll spindle 19 Reducer 20 Spindle supporting base 21 A pair of receiving rollers 22 Slot 23 Mill stand frame 24 Bracket 25 Detachment device 26 Pneumatic actuator 7 the shift lever 28 supporting pin 29 spline 30 spindle support 31 supports the receiving member 32 the support frame 33 supporting pin 34 bearing 35 bearing base 39 adapters hydraulic actuator 36 transverse receiving roller 37 vertically receiving roller 38 under the spindle

Claims (2)

[Claims] 1. An upper work roll having a roll shaft end formed in an oval cross section, and a roll coupling fitted and connected to a shaft end of the upper work roll and transmitting drive torque to a spindle. In a temper rolling mill, a fitting and removing device for fitting and removing the roll coupling and a roll shaft end portion,
A drive transmission device for a strip temper rolling mill, comprising: a support base for supporting the spindle when the roll coupling is separated from a shaft end of the upper work roll. 2. The roll coupling according to claim 1, further comprising a shift lever pivotally supported at a central portion, having an upper end connected to the actuator, and a lower end rotatably connected to the neck of the roll coupling. The drive transmission device for a strip temper rolling mill according to claim 1, wherein the portion is fitted and connected to a joint of the spindle via a spline.